CN107532104A

CN107532104A - Grease, mechanical component, and method for producing grease

Info

Publication number: CN107532104A
Application number: CN201680024421.5A
Authority: CN
Inventors: 中西祐辅; 熊谷洸
Original assignee: Idemitsu Kosan Co Ltd
Current assignee: Idemitsu Kosan Co Ltd
Priority date: 2015-04-30
Filing date: 2016-04-27
Publication date: 2018-01-02
Anticipated expiration: 2036-04-27
Also published as: EP3290497A4; WO2016175258A1; JP6693021B2; CN107532104B; US20180079983A1; EP3290497B1; JPWO2016175258A1; US10829711B2; EP3290497A1

Abstract

The invention provides lubricating grease which contains base oil and hydrophilic nanofibers, and hydrophilic nanofibers with a thickness (d) of 0.01-500 nm are dispersed. The grease has a low environmental load, is excellent in safety to the human body, has an appropriate working cone penetration and a high dropping point, and therefore is excellent in heat resistance.

Description

The manufacture method of lubricating grease, mechanism part and lubricating grease

Technical field

The present invention relates to lubricating grease and using the lubricating grease mechanism part and lubricating grease manufacture method.

Background technology

Lubricating grease sealing compared with lubricating oil is easier, from can realize the mechanical miniaturization applied, lightweight etc. Reason is set out, be widely used in automobile, various industrial machines various slippers lubrication.

Lubricating grease is mainly made up of base oil and thickener, and the solid property of lubricating grease is assigned by thickener, lubrication The performance of fat thickener and significant changes used in.

As usual widely used thickener, the fatty acid metal salts such as lithium soap can be enumerated, two carbamide compounds (such as are joined According to patent document 1).

However, there is problem in two carbamide compounds, in terms of environment, to the secure context of human body particularly as two ureas The isocyanates based compound of compound raw material has mutagenicity, is harmful to human body.Fatty acid metal is used as in addition, using The most dropping point of lubricating grease obtained from the lithium soap of salt is low, is not suitable for using at the position to reach a high temperature mostly.

In recent years, it is low, also excellent to the security of human body and using the increasing with biological degradability to develop carrying capacity of environment Lubricating grease obtained from thick dose.

For example, Patent Document 2 discloses lubricant composition, it is characterised in that as with biological degradability and profit The lubricant composition of the biological degradability of slip, heat resistance and excellent in te pins of durability, while containing base oil, gather containing shell At least one of sugar and chitin are used as thickener.

In patent document 2 in specifically disclosed lubricant composition, as thickener, the sheet that particle diameter is 4 ~ 10 μm is used Or powdered chitosan or chitin.

Prior art literature

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2008-274091 publications

Patent document 2：Japanese Unexamined Patent Publication 2013-116991 publications.

The content of the invention

Problems to be solved by the invention

However, for specifically disclosed lubricant composition in patent document 2, coordinate the sheet added as thickener or powder The chitosan or chitin of last shape are until work cone penetration reaches 273, but undisclosed specific use level.

In general, the thickener of the biological degradability such as chitosan, chitin is low with the compatibility of base oil, in order to obtain The high lubricating grease of cone penetration work, it is necessary to a large amount of (35 ~ 50 mass % or so) addition thickener.As described in patent document 2 A large amount of thickeners comprising biological degradability lubricant composition due to solid constituent it is more, therefore existing tendency is than oil The big particle of film thickness, i.e. a part for thickener float, and abrasion performance is poor.

The present invention is carried out to solve the above problems a little, its object is to, there is provided carrying capacity of environment is low, to human body Security is also excellent and with appropriate work cone penetration and with the lubricating grease of high dropping point；With the machine using the lubricating grease Structure part；And the manufacture method of lubricating grease.

For solving the method for problem

The present inventor etc. has found：Use environment load is low, to the security of human body also excellent Hydrophilic Nanofibrous as increasing Thick dose and it is dispersed with the lubricating grease of the Hydrophilic Nanofibrous fineness degree of specific fineness degree and can solve the problem that above-mentioned problem, so as to Complete the present invention.

That is, the present invention relates to following [1] ~ [4].

[1] lubricating grease, it contains base oil and Hydrophilic Nanofibrous, and be dispersed with fineness degree (d) for 0.01 ~ 500nm Hydrophilic Nanofibrous.

[2] lubricating grease, its be by the mixing of Hydrophilic Nanofibrous and base oil that fineness degree (d') be 0.01 ~ 500nm and Obtain.

[3] mechanism part, it uses the lubricating grease described in above-mentioned [1] or [2].

[4] manufacture method of lubricating grease, it has following step (1)：

Step (1)：The step of aqueous dispersions, base oil and dispersion solvent are mixed so as to prepare mixed liquor, the aqueous dispersions It is that average (d') for coordinating fineness degree in water obtains for 0.01 ~ 500nm Hydrophilic Nanofibrous.

The effect of invention

The carrying capacity of environment of the lubricating grease of the present invention is low, also excellent to the security of human body, and with the work cone penetration of appropriateness And there is high dropping point.

Embodiment

[mode of lubricating grease of the invention]

The lubricating grease of the present invention is the lubricating grease for 0.01 ~ 500nm Hydrophilic Nanofibrous containing base oil and fineness degree (d) (the 1st lubricating grease).

The present invention another way lubricating grease be by fineness degree (d') be 0.01 ~ 500nm Hydrophilic Nanofibrous and The lubricating grease (the 2nd lubricating grease) that base oil is obtained by mixing.

It should illustrate, in above-mentioned 2nd lubricating grease, preferably be obtained by mixing aqueous dispersions, base oil and dispersion solvent Lubricating grease, the aqueous dispersions be in water coordinate fineness degree (d') obtained for 0.01 ~ 500nm Hydrophilic Nanofibrous Arrive.It should illustrate, can be obtained by least removing water from the mixed liquor after the mixed liquor is prepared in the 2nd lubricating grease The lubricating grease or the lubricating grease as obtained from removing water and the dispersion solvent from the mixed liquor arrived.

Details as Follows states " manufacture method of lubricating grease of the invention " institute for above-mentioned aqueous dispersions, dispersion solvent etc. State.

The fineness degree (d) that the Hydrophilic Nanofibrous contained in the lubricating grease is defined in 1st lubricating grease (is dispersed to base The fineness degree (d) of Hydrophilic Nanofibrous in plinth oil), the hydrophily before base oil and mixing is defined in the 2nd lubricating grease and is received The fineness degree (d') of rice fiber.

By meeting the regulation, in base oil, Hydrophilic Nanofibrous easily forms higher structure, and easily makes hydrophilic Property nanofiber is dispersed.As a result, even if the content of Hydrophilic Nanofibrous is a small amount of, can also have the work of appropriateness Cone penetration and there is high dropping point, therefore the lubricating grease of excellent heat resistance can be made.

It should illustrate, in this specification, " content of Hydrophilic Nanofibrous is a small amount of " refers to：The Hydrophilic Nanofibrous Content be calculated as below 20 mass % (being preferably below 15 mass %, more preferably on the basis of the total amount (100 mass %) of lubricating grease For below 10 mass %).

In addition, in this specification, these " the 1st lubricating grease " and " the 2nd lubricating grease " are also referred to as " lubrication of the invention Fat " or " lubricating grease of a mode of the invention ".

The lubricating grease of the mode of the present invention can not damage containing base oil and while Hydrophilic Nanofibrous Evil effect of the present invention, in view of the influence to the security of human body in the range of, contain food, food additives and conventional Lubricating grease in the various additives that coordinate.

The total content of base oil and foregoing Hydrophilic Nanofibrous in the lubricating grease of the mode of the present invention is with this Meter is preferably more than 40 mass %, more preferably more than 60 mass %, is more preferably on the basis of the total amount (100 mass %) of lubricating grease More than 70 mass %, more preferably more than 80 mass %, still more preferably it is more than 90 mass %.

Hereinafter, illustrated for each composition included in the lubricating grease of the present invention.

It should illustrate, in the 1st lubricating grease of the invention and the 2nd lubricating grease, the details (fineness degree of Hydrophilic Nanofibrous Etc. (d') suitable shape, suitable form material, suitable content range etc.), the details of base oil (suitable species, property Shape and content range etc.) and the various additives that together coordinate with Hydrophilic Nanofibrous and base oil details (species, Content range etc.) etc. it is mutually the same.

The base oil included in lubricating grease as the present invention, can suitably be selected, for example, mineral according to purposes Oil, artificial oil and atoleine etc..

The base oil can be only by a kind of base oil formed or mixed base of more than two kinds is applied in combination Oil.

As mineral oil, for example, by paraffin base system mineral oil, middle base system mineral oil or cycloalkanes base system mineral The crude oil such as oil carry out air-distillation or reduced crude；Distillate oil obtained from these reduced crudes are evaporated under reduced pressure；To this A little distillate oils implement solvent deasphalting, solvent extractions, be hydrocracked, solvent dewaxing, catalytic dewaxing, the refinement treatment such as hydrofinishing One or more of (the specifically solvent-refined oil, hydrofined oil, dewaxing treatment oil, white of refined oil obtained from processing Soil processing oil etc.)；By to using manufactures such as fischer tropsch process wax (GTL waxes (Gas To Liquids WAX)) carry out isomerization and Obtained mineral oil wax etc..

Among these mineral oil, it is classified as the mineral of 3 classes in preferably API (American Petroleum Institute) basic oil classification Oil.

As artificial oil, for example, hydrocarbon system oil, aromatics system oil, ester system oil, ether system oil, plant oil, animality Oil, fatty acid ester etc..

As hydrocarbon system oil, for example, normal paraffin hydrocarbons, isoparaffin, polybutene, polyisobutene, 1- decene oligomerizations The poly-alpha-olefins (PAO) and their hydride etc. such as thing, 1- decene and ethylene copolymer oligomer.

As aromatics system oil, for example, the alkylbenzenes such as monoalkyl benzene, dialkyl benzene；Monoalkyl naphthalene, dialkyl group naphthalene, Alkylnaphthalenes such as more alkylnaphthalenes etc..

As ester system oil, can enumerate dibutyl sebacate, decanedioic acid two (2- ethylhexyls) ester, dioctyl adipate, Diisodecyl adipate (DIDA), adipic acid two (tridecyl) ester, glutaric acid two (tridecyl) ester, methyl acetyl ricinoleate ester Etc. diester-based oil；The aromatic ester systems such as the monooctyl ester of trimellitic acid three, trimellitic acid three last of the ten Heavenly stems ester, the monooctyl ester of Pyromellitic Acid four oil；Three Hydroxymethyl-propane caprylate, trimethylolpropane pelargonate, pentaerythrite -2 ethyl hexanoic acid ester, pentaerythrite pelargonate etc. are more First alcohol ester system oil；Complex ester system oil such as the oligoester that polyalcohol is formed with the fatty acid mixed of binary acid and monoacid etc..

As ether system oil, for example, polyethylene glycol, polypropylene glycol, polyethylene glycol monoether, polypropyleneglycol monoether etc. Polyglycols；Monoalkyl triphenyl ether, alkyl diphenyl base ether, dialkyl diphenyl ether, five phenyl ethers, tetraphenyl ether, monoalkyl four Phenyl ether system oil such as phenyl ether, dialkyl group tetraphenyl ether etc..

As plant oil, the oils of plant can be derived from, specifically, rapeseed oil, peanut oil, corn can be enumerated Oil, cottonseed oil, canola oil, soybean oil, sunflower oil, palm oil, coconut oil, safflower oil, camellia oil, olive oil, peanut oil etc..

As animality oil, for the oils from animal, specifically, lard, neat's foot oil, silkworm chrysalis oil, sand can be enumerated Fourth fish oil, herring oil etc..

As the aliphatic acid for forming fatty acid ester, preferably carbon number is 8 ~ 22 aliphatic acid, specifically, Ke Yiju Go out octanoic acid, capric acid, laurate, myristic acid, palmitic acid, stearic acid, behenic acid, erucic acid, palmitoleic acid, oleic acid, linoleic acid, Asia Numb acid, isostearic acid, arachidic acid, castor oil acid, 12- hydroxy stearic acids etc..

As specific fatty acid ester, fatty acid glyceride, polyglyceryl fatty acid ester and propylene glycol fatty acid can be enumerated Ester etc..

For fatty acid glyceride, for example, glycerin mono-fatty acid ester, glyceryl monostearate, glycerine list octanoic acid Ester, diolein, glycerol distearate, glycerol dicaprylate etc..

For polyglyceryl fatty acid ester, for example, DGMO, two glycerol monoisostearates, two sweet Oily dioleate, two glycerol trioleates, two glyceryl monostearates, two glycerol distearates, two glycerol tristearates, Two glyceryl triisostearates, two Monooctamoins, two glycerol dicaprylates, two tricaprylins, triglycerin list oleic acid Ester, triglycerin dioleate, triglycerin trioleate, the oleate of triglycerin four, triglycerin monostearate, triglycerin distearyl Acid esters, triglycerin tristearate, triglycerin tetrastearate, triglycerin list caprylate, triglycerin dicaprylate, triglycerin three Caprylate, the caprylate of triglycerin four, two glycerine list oleic acid monostearates, two glycerine list oleic acid distearates, two glycerine lists Sad monostearate, triglycerin list oleic acid monostearate, the oleic acid distearate of triglycerin two, the oleic acid list of triglycerin two are hard Resin acid ester, triglycerin list oleic acid monostearate list caprylate, Sunsoft Q 12D, two dilaurins, triglycerin Monolaurate, triglycerin trilaurin, triglycerin trilaurin, two monomyristins, the Pork and beans of two glycerine two The sub- oil of cool acid esters, TMM, the myristinate of triglycerin two, the myristinate of triglycerin three, two glycerine lists It is acid esters, two dilinoleins, triglycerin list linoleate, triglycerin dilinoleic acid ester, the linoleate of triglycerin three, ten sweet Oily monoleate, SY-Glyster MSW 750, ten glycerine list octanoic acid monoleates etc..

For methyl glycol fatty acid ester, for example, propylene glycol mono-oleate, propylene glycol monostearate, propane diols Single caprylate, PGML etc..

As atoleine, C can be enumerated_mH_n(m, n are more than 1 integer, wherein, n<There is side chain shown in 2m+2) Structure, the ester ring type hydrocarbon compound of ring structure or their mixture.

Among these, as the base oil that includes in the lubricating grease of the mode of the present invention, from fine with hydrophilic nano From the viewpoint of the compatibility of dimension, the mineral oil for being classified as 3 classes in the oil classification of API bases, artificial oil, plant are preferably comprised More than a kind in physical property oil, animality oil, fatty acid ester and atoleine.

Kinematic viscosity at 40 DEG C of the base oil used in a mode as the present invention, preferably 10 ~ 400mm²/ S, it is more preferably 15 ~ 300mm²/ s, more preferably 20 ~ 200mm²/ s, still more preferably it is 20 ~ 130mm²/s。

If the kinematic viscosity is 10mm²/ more than s, then it can suppress the phenomenon that oil separation occurs for lubricating grease.The opposing party Face, if the kinematic viscosity is 400mm²/ below s, then easily supply oil to slipper.

It should illustrate, the base oil used in the present invention can use the base oil by highly viscous base oil and low viscosity Combination is so that mixed base oil obtained from kinematic viscosity is adjusted to above range.

The viscosity index (VI) of the base oil used in a mode as the present invention, preferably more than 60, more preferably 70 Above, more preferably more than 80.

It should illustrate, in the present invention, kinematic viscosity and viscosity index (VI) at 40 DEG C refer to according to JIS K2283:2003 survey Fixed value.

The content of the base oil included in the lubricating grease of the mode of the present invention is with total amount (100 matter of the lubricating grease Measure %) on the basis of meter be preferably more than 40 mass %, more preferably more than 50 mass %, more preferably more than 60 mass %, more More preferably more than 70 mass %, furthermore it is preferred that being below 99.9 mass %.

In the present invention, Hydrophilic Nanofibrous refers to：By being formed and thickness comprising the material that formed with hydrophilic compound The fibrous material for below 500nm is spent, it is distinguished with tablet, powdered thing and granular substance.

In addition, in the present invention, for whether being " Hydrophilic Nanofibrous ", by as the nanofiber of object (threadiness Thing) be shaped to tablet, and when water droplet to be added dropwise to the surface of the tablet, the contact angle of (1) and water for less than 90 ° or (2) in the case that the water droplet being added dropwise is absorbed rapidly by tablet, the nanofiber is judged as " Hydrophilic Nanofibrous ".

Further, in the present invention, " fineness degree " of Hydrophilic Nanofibrous is identical with the fineness degree of the fibrous material of routine, In section when vertically being cut off relative to tangential direction at the arbitrfary point on the side of Hydrophilic Nanofibrous, if this is cut Section is circle or Elliptical circle, then refers to diameter or major diameter, if the section is polygon, refer to the circumscribed circle of the polygon Diameter.

As thickener, the sheet of several μm of sizes, powdered or granular hydrophilic compounds are engaged to base oil When middle, hydrophilic compounds are assembled in base oil, are easily formed so-called " caking ".As a result, in gained lubricating grease The aggregation of hydrophilic compounds is separated out on surface, dispersity easily becomes uneven.Now, in order to improve gained lubricating grease Work cone penetration, it is necessary to add substantial amounts of hydrophilic compounds, but due to comprising the particle bigger than oil film thickness, therefore formed The lubricating grease of abrasion performance difference.

On the other hand, lubricating grease of the invention is dispersed with the Hydrophilic Nanofibrous that fineness degree (d) is 0.01 ~ 500nm, because This, in base oil, Hydrophilic Nanofibrous can be also uniformly dispersed while higher structure is formed.As a result, to the greatest extent The content of pipe Hydrophilic Nanofibrous is a small amount of, the work cone penetration with appropriateness can also be made and with the lubrication of high dropping point Fat.

In the present invention, " fineness degree (d) " represents to be dispersed in the fineness degree of Hydrophilic Nanofibrous in base oil, and aftermentioned " fineness degree (d') of Hydrophilic Nanofibrous " as raw material before being engaged in base oil distinguishes.

The fineness degree (d) for the Hydrophilic Nanofibrous being dispersed in base oil is 0.01 ~ 500nm, from the above point of view, Preferably 0.1 ~ 300nm, more preferably 1 ~ 200nm, more preferably 2 ~ 100nm.

It should illustrate, as long as lubricating grease of the invention at least confirms the hydrophilic nano that fineness degree (d) is above range Fiber disperses, then can also be dispersed with the Hydrophilic Nanofibrous that fineness degree (d) deviates above range.

Wherein, in the lubricating grease of the mode of the present invention, height is formed easily by Hydrophilic Nanofibrous from being made Level structure, from the viewpoint of making the dispersed lubricating grease of Hydrophilic Nanofibrous, received from the hydrophily being dispersed in base oil The average value of the fineness degree (d) of optional 10 Hydrophilic Nanofibrous is preferably 0.01 ~ 500nm (more excellent in rice fiber Elect 0.1 ~ 300nm, more preferably 1 ~ 200nm as, be still more preferably 2 ~ 100nm).

In addition, from the above point of view, among the Hydrophilic Nanofibrous included in lubricating grease of the invention, arbitrarily selecting In 10 selected, fineness degree (d) preferably has more than 1 (more preferably 5 for the radical of the Hydrophilic Nanofibrous of above range It is more than root, more preferably more than 7), on the fineness degrees (d) of more preferably selected 10 Hydrophilic Nanofibrous is State the Hydrophilic Nanofibrous of scope.

The draw ratio of Hydrophilic Nanofibrous included in lubricating grease as the present invention, preferably more than 5, more preferably More than 10, it is more preferably more than 15.

It should illustrate, " draw ratio " refers to the length of the Hydrophilic Nanofibrous as the object of observation relative to fineness degree Ratio [length/fineness degree], " length " of Hydrophilic Nanofibrous refer to the distance of the Hydrophilic Nanofibrous farthest 2 points it Between distance.

In addition, the part as the Hydrophilic Nanofibrous of the object of observation contacts and difficult with other Hydrophilic Nanofibrous During assert " length ", among the Hydrophilic Nanofibrous of the object of observation, length only is determined to the part that can determine fineness degree Degree, as long as the draw ratio of the part is above range.

Further, among the Hydrophilic Nanofibrous included in lubricating grease of the invention, optional 10 hydrophilies The average value (hereinafter also referred to " average aspect ratio ") of the draw ratio of nanofiber be preferably more than 5 (more preferably more than 10, enter One step is preferably more than 15).

As the fineness degree (d') of the Hydrophilic Nanofibrous as raw material before being mixed with base oil, preferably 0.01 ~ 500nm, more preferably 0.1 ~ 300nm, more preferably 1 ~ 200nm, still more preferably it is 2 ~ 100nm.

In addition, the average aspect ratio as the Hydrophilic Nanofibrous as raw material before being mixed with base oil, preferably For more than 5, more preferably more than 10, more preferably more than 15.

It should illustrate, in the present invention, " fineness degree (d) " of the Hydrophilic Nanofibrous being dispersed in base oil and coordinate " fineness degree (d') " and these Hydrophilic Nanofibrous of the Hydrophilic Nanofibrous as raw material before into base oil Draw ratio be value using the measure such as electron microscope.

As long as the Hydrophilic Nanofibrous used in the mode of the present invention is by comprising with hydrophilic compound Material is formed to form.As with hydrophilic compound, the official with the hydrogen bond hydroxyl such as hydroxyl, amino can be enumerated Can the compound of group, metal oxide etc..

But from being made, carrying capacity of environment is low, to the viewpoint of the security of human body also excellent lubricating grease and makes and base oil Compatibility it is good from the viewpoint of, as the Hydrophilic Nanofibrous that uses in the mode of the present invention, preferably comprise more Carbohydrate, more than a kind polysaccharide in cellulose, carboxymethyl cellulose, chitin and chitosan is more preferably included, further Preferably comprise cellulose.

It should illustrate, as cellulose, lignin, hemicellulose can be contained.Furthermore, it is possible to for by lignin, half fibre Tie up plain modification and comprising the modified cellulose (such as lignocellulosic etc.) from lignin, the structure of hemicellulose.

In addition, the Hydrophilic Nanofibrous used in the mode of the present invention can also be used to implement its surface and changed Property processing fiber.

More specifically, it can also use and the surface of Hydrophilic Nanofibrous be implemented selected from esterification, phosphorylation, amino Formic acid esterification, phosphinylidyne amination, etherificate, carboxy methylation, TEMPO oxidations and the parent of more than a kind modification in periodate oxidation Water nano fiber.

In the Hydrophilic Nanofibrous used in the mode of the present invention, as the content of polysaccharide, received with hydrophily Meter is preferably 60 ~ 100 mass %, is more preferably 70 ~ 100 mass %, is further excellent on the basis of the total amount (100 mass %) of rice fiber Elect 80 ~ 100 mass % as, be still more preferably 90 ~ 100 mass %.

As the degree of polymerization of polysaccharide, preferably 50 ~ 3000, more preferably 100 ~ 1500, more preferably 150 ~ 1000th, still more preferably it is 200 ~ 800.

It should illustrate, in the present invention, the degree of polymerization of polysaccharide polymer refers to by viscosimetry the value that determines.

In the lubricating grease of the present invention, the content of Hydrophilic Nanofibrous is on the basis of the total amount (100 mass %) of the lubricating grease Meter is preferably 0.1 ~ 20 mass %, more preferably 0.5 ~ 17 mass %, is more preferably 0.7 ~ 15 mass %, still more preferably For 1.0 ~ 10 mass %.

If the content of Hydrophilic Nanofibrous is more than 0.1 mass %, the work cone penetration with appropriateness can be made And the lubricating grease with high dropping point.

On the other hand, if the content of Hydrophilic Nanofibrous is below 20 mass %, excellent wear resistance can be made Lubricating grease.

, can also be further containing normal in the range of effect of the present invention is not damaged in the lubricating grease of the mode of the present invention The various additives coordinated in the lubricating grease of rule.

As the various additives, for example, antirust agent, antioxidant, lubricity improver, tackifier, modification Agent, dispersing aid, detergent-dispersant additive, anticorrosive, defoamer, extreme pressure agent, metal inerting agent etc..

It should illustrate, these various additives can be used individually, and two or more can also be applied in combination.

In addition, in the lubricating grease of the mode of the present invention, in the range of lubricating grease state is able to maintain that, can contain The dispersion solvent and water used when lubricating esterified.

In the lubricating grease of the mode of the present invention, as dispersion solvent and the total content of water, with the total of the lubricating grease Measure (100 mass %) on the basis of meter be preferably 0 ~ 60 mass %, more preferably 0 ~ 30 mass %, more preferably 0 ~ 10 mass %, Still more preferably it is 0 ~ 5 mass %.

(antirust agent)

As antirust agent, for example, carboxylic serials antirust agent, amine system antirust agent, carboxylate system antirust agent etc..

When the lubricating grease of the mode of the present invention contains antirust agent, the content of antirust agent is with the total amount (100 of the lubricating grease Quality %) on the basis of meter be preferably 0.1 ~ 10.0 mass %, more preferably 0.3 ~ 8.0 mass %, more preferably 1.0 ~ 5.0 matter Measure %.

(antioxidant)

As antioxidant, for example, amine system antioxidant, phenol antioxidant, sulphur system antioxidant, two thio phosphorus Sour zinc etc..

When the lubricating grease of the mode of the present invention contains antioxidant, the content of antioxidant is with the total amount of the lubricating grease Meter is preferably 0.05 ~ 10 mass %, more preferably 0.1 ~ 7 mass %, more preferably 0.2 ~ 5 matter on the basis of (100 mass %) Measure %.

(lubricity improver)

As lubricity improver, for example, sulphur compound (vulcanization grease, olefine sulfide, polysulfide, sulfide mineral The D2EHDTPA such as oil, trithiophenyl phosphate class, thiocarbamic acid class, thio terpenes, dialkyl thiodipropionate class Deng), phosphate, phosphite ester (tricresyl phosphate, triphenyl phosphite etc.) etc..

When the lubricating grease of the mode of the present invention contains lubricity improver, the content of lubricity improver is with the lubrication Meter is preferably 0.01 ~ 20 mass %, more preferably 0.1 ~ 10 mass %, is more preferably on the basis of the total amount (100 mass %) of fat 0.2 ~ 5 mass %.

(tackifier)

Tackifier are the materials of viscosity that is as needed and improving aforementioned base oil, are in order to which the base oil comprising tackifier is adjusted Whole to appropriate kinematic viscosity and the material coordinated.

As tackifier, for example, polymethacrylates (PMA), olefin copolymer (OCP), polyoxyethylene alkylphenyl second Alkene (PAS), styrenic-diene copolymer (SCP) etc..

When the lubricating grease of the mode of the present invention contains tackifier, the content of tackifier is with the total amount (100 of the lubricating grease Quality %) on the basis of meter be preferably 0.01 ~ 20 mass %, more preferably 0.1 ~ 10 mass %, more preferably 0.2 ~ 5 mass %.

(modifying agent)

In the lubricating grease of the mode of the present invention, in order to control the hydrophily of Hydrophilic Nanofibrous, modifying agent can be added And the lubricating grease of water resistance is made.

As modifying agent, it is known that using the modifying agent of electrostatic interaction, for example, alkyl ketene dimer, fat Cationic surface active agent, the polymethacrylates such as the mixture of fat acid bisamide, rosin milk and ammonium sulfate etc..

Among these modifying agent, preferably polymethacrylates.

When the lubricating grease of the mode of the present invention contains modifying agent, the content of modifying agent is with the total amount (100 of the lubricating grease Quality %) on the basis of meter be preferably 0.01 ~ 20 mass %, more preferably 0.1 ~ 10 mass %, more preferably 0.2 ~ 5 mass %.

(dispersing aid)

As dispersing aid, for example, succinic acid half ester, urea, various surfactants etc..

(detergent-dispersant additive, anticorrosive, defoamer, extreme pressure agent, metal inerting agent)

As detergent-dispersant additive, for example, succimide, boron system succimide etc..

As anticorrosive, for example, BTA based compound, thiazole compound etc..

As defoamer, for example, silicone compound, fluorinated silicone based compound etc..

As extreme pressure agent, for example, phosphorus series compound, zinc dithiophosphate, organic-molybdenum etc..

As metal inerting agent, for example, BTA etc..

When the lubricating grease of the mode of the present invention contains these additives, each content of these additives is with the lubricating grease Total amount (100 mass %) on the basis of meter be preferably 0.01 ~ 20 mass %, more preferably 0.1 ~ 10 mass %, more preferably 0.2 ~ 5 mass %.

[characteristic of lubricating grease of the invention]

The lubricating grease of the present invention forms higher structure easily by Hydrophilic Nanofibrous, and has been uniformly dispersed hydrophily and has received Rice fiber.Therefore, even if the content of lubricating grease Hydrophilic Nanofibrous of the invention is a small amount of, it may have appropriate Drawing cone enters Spend and there is high dropping point.

As the work cone penetration at 25 DEG C of the lubricating grease of the mode of the present invention, reach from hardness of grease is made The scope of appropriateness simultaneously makes from the viewpoint of low temperature torque characteristic, abrasion performance reach good, and preferably 130 ~ 475, more preferably 160 ~ 445, it is more preferably 175 ~ 430, is still more preferably 200 ~ 350.

It should illustrate, in this specification, the work cone penetration of lubricating grease is according to JIS K2220 7:The value of 2013 measure.

As the present invention a mode lubricating grease dropping point, preferably more than 180 DEG C, be more preferably more than 200 DEG C, More preferably more than 220 DEG C.

It should illustrate, in this specification, the dropping point of lubricating grease is according to JIS K2220 8:The value of 2013 measure.

[manufacture method of lubricating grease of the invention]

The manufacture method of lubricating grease of the present invention preferably at least has following step (1), more preferably with following step (1) and (2)。

Step (1)：The step of aqueous dispersions, base oil and dispersion solvent are mixed so as to prepare mixed liquor, the moisture Dispersion liquid is to coordinate fineness degree (d') to be obtained for 0.01 ~ 500nm Hydrophilic Nanofibrous in water.

Step (2)：The step of water being removed from foregoing mixed liquor.

The mutual aggregation of the lubricating grease obtained by such step Hydrophilic Nanofibrous in base oil is suppressed, In the state of fiber shape is maintained, the Hydrophilic Nanofibrous that fineness degree (d) can be made to be 0.01 ~ 500nm disperses.It is tied Fruit is can to manufacture to form higher structure by Hydrophilic Nanofibrous in base oil and dispersed have hydrophilic nano The lubricating grease of fiber.

Hereinafter, illustrated for step (1) and (2).

Step (1) is aqueous dispersions the step of mixing aqueous dispersions, base oil and dispersion solvent so as to prepare mixed liquor It is to coordinate fineness degree (d') to be obtained for 0.01 ~ 500nm Hydrophilic Nanofibrous in water.

The Hydrophilic Nanofibrous and the details of base oil used in step (1) is as described above.

Should illustrate, herein alleged " fineness degree (d') " as described above, represent be engaged in base oil, in water before It is as described above as the fineness degree of the Hydrophilic Nanofibrous of raw material, the suitable scope of " fineness degree (d') ".

As the solid component concentration of aqueous dispersions obtained from coordinating Hydrophilic Nanofibrous, with the total of the aqueous dispersions Measure (100 mass %) on the basis of meter be usually 0.1 ~ 70 mass %, be preferably 0.1 ~ 65 mass %, more preferably 0.1 ~ 60 mass %, More preferably 0.5 ~ 55 mass %, still more preferably it is 1.0 ~ 50 mass %.

The aqueous dispersions can by coordinating Hydrophilic Nanofibrous, surfactant as needed etc. in water, and Manually or mixer is sufficiently stirred to prepare.

As dispersion solvent, as long as with water and the oil good solvent of compatibility of both, N is preferably selected from, The aprotic polars such as dinethylformamide (DMF), DMAC N,N' dimethyl acetamide (DMAc) and 1-METHYLPYRROLIDONE (NMP) Solvent；The alcohols such as propyl alcohol, ethylene glycol, propane diols and hexylene glycol；The surface such as polyglyceryl fatty acid ester and Sorbitan carboxylic ester More than a kind in activating agent.

The use level of dispersion solvent in the mixed liquor prepared by step (1) is with the total amount (100 mass %) of mixed liquor Benchmark meter is preferably 0.1 ~ 50 mass %, more preferably 0.5 ~ 40 mass %, more preferably 1.0 ~ 30 mass %.

The use level of water in the mixed liquor prepared by step (1) is counted on the basis of the total amount (100 mass %) of mixed liquor Preferably 1 ~ 60 mass %, more preferably 3 ~ 50 mass %, more preferably 5 ~ 40 mass %.

As the water in the mixed liquor prepared by step (1) and the use level ratio [water/dispersion solvent] of dispersion solvent with Mass ratio meter is preferably 0.01 ~ 600, is more preferably 0.05 ~ 400, is more preferably 0.1 ~ 300, is still more preferably 0.2 ~200。

Mixture can add the same of the aqueous dispersions for being combined with Hydrophilic Nanofibrous, base oil and dispersion solvent When, also add the above-mentioned various additives coordinated in conventional lubricating grease.These compositions are mixed and manually or mixer Fully it is stirred, so as to prepare mixture.

Should illustrate, in step (1) as long as after obtained lubricating grease be able to maintain that the state of lubricating grease state, then can be with Containing dispersion solvent and water without following step (2).Now, the post processing such as homogenization by having used roller mill etc. walks Suddenly, the lubricating grease of the present invention can be obtained.

Step (2) be from the mixed liquor prepared by step (1) at least remove water the step of.

It should illustrate, in this step, can together remove water and dispersion solvent from the mixed liquor.

As the method for removing water and dispersion solvent, mixture is preferably heated to evaporate the side of removing water and dispersion solvent Method.

Condition during water is removed as evaporation, preferably with 0 ~ 100 DEG C of temperature in the environment of pressure is 0.001 ~ 0.1MPa Scope is spent to heat mixture.

In addition, as evaporation remove dispersion solvent when condition, preferably pressure be 0.001 ~ 0.1MPa in the environment of with The temperature range of -0 DEG C of -120 DEG C of [boiling point (DEG C) of dispersion solvent] ~ [boiling point (DEG C) of dispersion solvent] heats mixture.

It should illustrate, the evaporation of water and dispersion solvent is removed and can also carried out by air-distillation.

After mixture removes water and dispersion solvent, post-processed as needed through homogenization for having used roller mill etc. etc. Step, the lubricating grease of the present invention can be obtained.

[using mechanism part obtained from the lubricating grease of the present invention]

The carrying capacity of environment of the lubricating grease of the present invention is low, also excellent to the security of human body, and with the work cone penetration of appropriateness And there is high dropping point.In addition, even if the lubricating grease of the present invention is a small amount of as the content of the Hydrophilic Nanofibrous of thickener, With appropriate work cone penetration and with high dropping point, therefore it can also improve abrasion performance.

Therefore, even if having used, the mechanism part lubricating grease of the lubricating grease of the present invention is scattered, leakage, in environmental protection, right Problem is also few in terms of the security of human body, even if can also maintain lubrication property for a long time at high temperature.

As the mechanism part for the lubricating grease for having used the present invention, bearing, gear etc. can be enumerated, more specifically, can Passed with enumerating the various bearings such as sliding bearing, rolling bearing, oiliness bearing, FDB, gear, internal combustion engine, brake, moment of torsion Lead device part, fluid coupling, compression set part, chain, oil gear part, vacuum pump apparatus part, clock Exterior portion part, hard disk part, part used for refrigerator, cutter part, calender part, drawbench part, it is rolled into Type machine with part, forging machine with part, heat-treating machine with part, thermal medium with part, cleaning machine with part, damping machine portion Part, sealing device part etc..

It should illustrate, the lubricating grease of of the invention mode is as slippers such as the bearing of food machinery, gears Lubrication applications are also suitable.

According to above-mentioned item, the present invention also provides following mechanism parts and the application method of lubricating grease.

(1) mechanism part, it uses lubricating grease of the invention.

(2) application method of lubricating grease, wherein, the lubricating grease of the present invention is used for the mechanism part for lubricating food machinery.

The mechanism part of above-mentioned (1) is preferably the mechanism assembled in the food machinery of mixed food raw material, manufacture food etc. Part.

In addition, " lubricating grease " that is used in above-mentioned (1) and (2) is the lubricating grease of the present invention, details are as described above.

Embodiment

Then, the present invention is described in more detail by embodiment, the present invention is not limited because of these examples completely.

It should illustrate, each characteristic is obtained according to method described below.

(1) 40 DEG C of kinematic viscosity, viscosity index (VI)

According to JIS K2283:2000 are measured.

(2) fineness degree of Hydrophilic Nanofibrous, draw ratio

Using transmission type electronic microscope (TEM), determine respectively optional 10 Hydrophilic Nanofibrous fineness degree and Length, the value calculated by " length "/" fineness degree " is denoted as " draw ratio " of the Hydrophilic Nanofibrous as object.

(3) work cone penetration

According to JIS K2220 7:2013, it is measured at 25 DEG C.

(4) dropping point

According to JIS K2220 8:2013 are measured.

Base oil, Hydrophilic Nanofibrous and the dispersion solvent used in embodiment 1 ~ 3, comparative example 1 and reference example 1 it is detailed Feelings are as follows.

Aromatic ester system oil：40 DEG C of kinematic viscosity=91mm²/ s, viscosity index (VI)=80.

CNF dispersion liquids (1)：スギノマシ Application (strain) is made, and ProductName " BiNFi-s " (is comprising the 2.0 mass % degree of polymerization 600 cellulose nano-fibrous (CNF) is (more than fineness degree (d')=20 ~ 50nm (average value 35nm), draw ratio=100 (average Be worth for more than 100)) aqueous dispersions).

CNF dispersion liquids (2)：スギノマシ Application (strain) is made, and ProductName " BiNFi-s " (is comprising the 2.0 mass % degree of polymerization 300 cellulose nano-fibrous (CNF) is (more than fineness degree (d')=20 ~ 50nm (average value 35nm), draw ratio=100 (average Be worth for more than 100)) aqueous dispersions).

・DMF：N,N-dimethylformamide.

・DMAc：DMAC N,N' dimethyl acetamide.

Embodiment 1

Using as above-mentioned CNF dispersion liquids (1) 180g (wherein, the CNF amounts of Hydrophilic Nanofibrous dispersion liquid：3.6g), as base The above-mentioned aromatics ester oil 140g of plinth oil and the DMF 150g mixing as dispersion solvent, are sufficiently stirred at 25 DEG C, so as to prepare Mixed liquor.

Also, the mixed liquor is heated to 70 DEG C in the environment of 0.01MPa, evaporates after removing water, enters from the mixed liquor One step is heated to 110 DEG C in the environment of 0.01MPa, is also evaporated from the mixed liquor and removes DMF.

Then, room temperature (25 DEG C) is cooled to, then carries out homogenize process using triple-roller mill, the content for obtaining CNF is 2.5 Quality % lubricating grease.

Optional 10 CNF fineness degree (d) is 20 ~ 50nm (thicknesses in the CNF disperseed from gained lubricating grease The average value for spending (d) is 35nm), the draw ratio of 10 CNF is more than 100 (average value of draw ratio is also more than 100). In addition, the work cone penetration of the lubricating grease is 273, dropping point is 250 DEG C.

Embodiment 2

In addition to using above-mentioned CNF dispersion liquids (2) to be used as Hydrophilic Nanofibrous dispersion liquid, with side same as Example 1 Formula, the content for obtaining CNF is 2.5 mass % lubricating grease.

Optional 10 CNF fineness degree (d) is 20 ~ 50nm (thicknesses in the CNF disperseed from gained lubricating grease The average value for spending (d) is 35nm), the draw ratio of 10 CNF is more than 100 (average value of draw ratio is also more than 100). In addition, the work cone penetration of the lubricating grease is 259, dropping point is 258 DEG C.

Embodiment 3

In addition to using DMAc as dispersion solvent, in the same manner as example 1, the content for obtaining CNF is 2.5 matter Measure % lubricating grease.

Optional 10 CNF fineness degree (d) is 20 ~ 50nm (thicknesses in the CNT disperseed from gained lubricating grease The average value for spending (d) is 35nm), the draw ratio of 10 CNF is more than 100 (average value of draw ratio is also more than 100). In addition, the work cone penetration of the lubricating grease is 273, dropping point is 245 DEG C.

Comparative example 1

Cellulose powder (particle diameter is 38 μm, the sieving of 400 mesh, and the pure medicine company system of light) 60g is mixed with aromatics ester oil 90g, It is sufficiently stirred at 25 DEG C.Homogenize process is carried out using triple-roller mill, obtains the lubricating grease that cellulose powder is 40 mass %.

The cone penetration of gained lubricating grease is 289, dropping point is more than 300 DEG C (solidification is charred in continuous mode).Should Illustrate, in surface observation the floating to the particle bigger than oil film thickness of gained lubricating grease.

Reference example 1

Coordinate diphenyl methane -4,4'- diisocyanate (MDI) 15g in aromatics ester oil 100g, make its heating molten at 70 DEG C Solution, prepare MDI solution.In addition, coordinating octylame 15g in aromatics ester oil 70g into another reactor, its heating is made at 70 DEG C Dissolving, prepares octylame solution.

Also, manufactured to lubricating grease in kettle and put into above-mentioned MDI solution, it is molten that above-mentioned octylame is added dropwise while being stirred vigorously Liquid, heat and make its reaction.Also, at the time of reaction temperature reaches 160 DEG C, kept for 1 hour at 160 DEG C, make its abundant Reaction.

Then, room temperature (25 DEG C) is cooled to, then homogenize process is carried out using triple-roller mill, obtains lubricating grease.

The work cone penetration of gained lubricating grease is 273, dropping point is 280 DEG C.

It is that the lubricating grease of embodiment 1 ~ 3 obtains as a result, although the content as the Hydrophilic Nanofibrous of thickener is few To 2.5 mass %, it may have work cone penetration and dropping point with the lubricating grease same degree of reference example 1.

It is believed that the lubricating grease of embodiment 1 ~ 3 uses Hydrophilic Nanofibrous as thickener, therefore carrying capacity of environment Low, also excellent to the security of human body, the content of the fineness degree Hydrophilic Nanofibrous bigger than oil film thickness is few therefore resistance in addition Abrasivity is excellent.

On the other hand, it can be seen from comparative example 1, in order that high to obtain cone penetration by the use of cellulose powder as thickener Lubricating grease is, it is necessary to coordinate up to 40 mass % cellulose powder.In addition, the lubricating grease obtained by comparative example 1 includes up to 40 Quality % cellulose powder, therefore floating for bulky grain is observed that on surface, it is to be difficult to referred to as cellulose powder uniformly to divide Scattered situation.It can be considered that the abrasion performance of the lubricating grease is poor.

Base oil, thickener, various additives and the dispersion solvent used in following embodiments 4 ~ 17 Details as Follows institute Show.

Mineral oil：40 DEG C of kinematic viscosity=91mm²/ s, viscosity index (VI)=105, paraffin base system mineral oil.

Vegetable oil：40 DEG C of kinematic viscosity=39mm²/ s, viscosity index (VI)=205, rapeseed oil.

・PAO：40 DEG C of kinematic viscosity=64mm²/ s, viscosity index (VI)=135, poly alpha olefin.

CNF dispersion liquids (3)：スギノマシ Application (strain) is made, and ProductName " BiNFi-s " (is comprising the 2.0 mass % degree of polymerization 200 cellulose nano-fibrous (CNF) is (more than fineness degree (d')=20 ~ 50nm (average value 35nm), draw ratio=100 (average Be worth for more than 100)) aqueous dispersions).

Lignocellulosic dispersion liquid：The aqueous dispersions of lignocellulosic nanofiber comprising 2.0 mass %.The lignocellulosic More than fineness degree (d')=20 ~ 50nm (average value 35nm) of nanofiber, draw ratio=100 (average value is more than 100).

Esterified cellulose dispersion liquid：The aqueous dispersions of esterified cellulose nanofiber comprising 2.0 mass %.Lignocellulosic More than fineness degree (d')=20 ~ 50nm (average value 35nm), draw ratio=100 (average value is more than 100).

It should illustrate, the nanofiber included in above-mentioned dispersion liquid obtains following result：To by each nanofiber into When water droplet is added dropwise in the surface of tablet obtained from type, " contact angle with water is less than 90 ° " or " dripped before contact angle is determined The water droplet added is absorbed by tablet ".Therefore, any nanofiber meets " Hydrophilic Nanofibrous " alleged in the present invention.

・PMA：Polymethacrylates (PMA), is used as modifying agent.

Succinic acid half ester：Used as dispersing aid.

Urea：Used as dispersing aid.

Dispersion solvent (1)：Hexylene glycol.

Dispersion solvent (2)：Polyglyceryl fatty acid ester.

Dispersion solvent (3)：Sorbitan alkyd laurate.

Embodiment 4 ~ 13

The base oil of species and use level shown in table 1, thickener, various additives and dispersion solvent are mixed, filled at 25 DEG C Divide stirring, prepare mixed liquor.It should illustrate, the use level of the thickener shown in table 1 is to remove to wrap in the dispersion liquid after solvent The solid constituent use level of the thickener contained.

Also, the mixed liquor is heated to 70 DEG C in the environment of 0.01MPa, evaporates after removing water, enters from the mixed liquor One step is heated to 110 DEG C in the environment of 0.01MPa, also evaporates removing dispersion solvent from the mixed liquor.

Then, room temperature (25 DEG C) is cooled to, then carries out homogenize process using triple-roller mill, respectively obtains and increases shown in table 1 Lubricating grease (a) ~ (j) of thick agent concentration.

For prepared lubricating grease (a) ~ (j), work cone penetration and dropping point are determined.In addition, for lubricating grease (a) ~ (d) washing fastness to water experiment described below, is further also carried out.These results are shown in table 1.

[experiment of washing fastness to water]

Using 38 DEG C of water, by according to JIS K2220:The method of 2013 washing durability degree test method, determines and is rushed by water The lubricating grease fallen relative to the mass % of lubricating grease amount 100 before experiment quality.

It may be said that the big lubricating grease of the quality is the excellent lubricating grease of the cleaning based on water, on the other hand, it may be said that should The small lubricating grease of quality is the lubricating grease of excellent water resistance.

[table 1]

。

Lubricating grease (a) ~ (j) obtained by embodiment 4 ~ 13 obtains the work cone penetration with appropriateness and with high dropping point Result.

It should illustrate, for lubricating grease (a) ~ (j), optional 10 from the various CNF being dispersed in each lubricating grease The various CNF of root fineness degree (d) is 20 ~ 50nm (average value 35nm), and 10 various CNF draw ratio is more than 100 (average value is also more than 100).

In addition, the result tested according to washing fastness to water is it may be said that lubricating grease (a) and (c) are that the cleaning based on water is high Lubricating grease.On the other hand, it may be said that lubricating grease (b) and (d) are the lubricating grease of excellent water resistance.

Embodiment 14 ~ 16

For the base oil of species, thickener and dispersion solvent shown in table 2, with the content of each composition in the lubricating grease after preparation The mode for reaching the amount of Table 2 is coordinated, and is fully stirred at 25 DEG C, is prepared mixed liquor.It should illustrate, shown in table 2 Amount of thickener be remove dispersion liquid in solvent after thickener solid constituent use level.

Also, the mixed liquor is heated to 70 DEG C in the environment of 0.01MPa, is evaporated from the mixed liquor and removes water.Should Illustrate, for the dispersion solvent shown in table 2, remove operation without evaporation and directly remain.

Then, room temperature (25 DEG C) is cooled to, then homogenize process is carried out using triple-roller mill, respectively obtains shown in table 2 Lubricating grease (k) ~ (m) of thickener concentration.It should illustrate, as shown in table 2 like that, the content of the water in lubricating grease (k) ~ (m) is 0 Quality %.

It should illustrate, lubricating grease (k) ~ (m) uses PAO, plant using the dispersion solvent for being approved as food additives It is oily based on oil, and use it is cellulose nano-fibrous be used as thickener, therefore security is excellent, is suitable as food machinery and uses Lubricant.

Embodiment 17

Also, homogenize process directly is carried out using triple-roller mill to the mixed liquor, obtains thickener concentration shown in table 2 Lubricating grease (n).It should illustrate, as shown in table 2 like that, the water content in lubricating grease (n) is 38.0 mass %, and the water is derived from conduct Thickener and the dispersion liquid added.

For prepared lubricating grease (k) ~ (n), work cone penetration and dropping point are determined.These results are shown in table 2.

[table 2]

。

In embodiment 14 ~ 16, it can also realize that lubrication is esterified in the state of dispersion solvent is remained, gained lubrication Fat (k) ~ (m) obtains the work cone penetration with appropriateness and with the result of high dropping point.

In addition, in embodiment 17, it can also be realized in the state of water is remained and lubricate esterified, gained lubricating grease (n) result with appropriateness work cone penetration is also obtained.It should illustrate, the dropping point of lubricating grease (n) includes in by the lubricating grease (n) Water boiling point influence and can not determine, but during in view of being difficult to the property thermally decomposed as the CNF of thickener, it is believed that It is the lubricating grease of excellent heat resistance.

In addition, being directed to lubricating grease (k) ~ (n), optional 10 CNF's is thick from the CNF being dispersed in each lubricating grease Fineness (d) is 20 ~ 50nm (average value 35nm), 10 various CNF draw ratio be more than 100 (average value be 100 with On).

Claims

1. lubricating grease, it contains base oil and Hydrophilic Nanofibrous, and it is 0.01 ~ 500nm's to be dispersed with fineness degree (d) Hydrophilic Nanofibrous.

2. lubricating grease according to claim 1, wherein, the content of the Hydrophilic Nanofibrous is with the total of the lubricating grease 0.1 ~ 20 mass % is calculated as on the basis of amount.

3. lubricating grease according to claim 1 or 2, wherein, it is dispersed with the Hydrophilic Nanofibrous that draw ratio is more than 5.

4. the lubricating grease according to any one of claim 1 ~ 3, wherein, the Hydrophilic Nanofibrous includes and is selected from fiber More than a kind polysaccharide in element, carboxymethyl cellulose, chitin and chitosan.

5. the lubricating grease according to any one of claim 1 ~ 4, it also contains water resistance improvers.

6. lubricating grease, it is to be obtained by mixing Hydrophilic Nanofibrous and base oil that fineness degree (d') is 0.01 ~ 500nm.

7. lubricating grease according to claim 6, it is by the way that aqueous dispersions, base oil and dispersion solvent are mixed so as to make Water and the dispersion solvent are removed after standby mixed liquor, from the mixed liquor so as to obtain, the aqueous dispersions are coordinated slightly in water Fineness (d') obtains for 0.01 ~ 500nm Hydrophilic Nanofibrous.

8. mechanism part, the lubricating grease any one of its usage right requirement 1 ~ 7.

9. the manufacture method of lubricating grease, it has following step (1),

Step (1)：The step of aqueous dispersions, base oil and dispersion solvent are mixed so as to prepare mixed liquor, the aqueous dispersions It is to coordinate fineness degree (d') to be obtained for 0.01 ~ 500nm Hydrophilic Nanofibrous in water.

10. the manufacture method of lubricating grease according to claim 9, it has following step (1) ~ (2),

Step (1)：The step of aqueous dispersions, base oil and dispersion solvent are mixed so as to prepare mixed liquor, the aqueous dispersions It is to coordinate fineness degree (d') to be obtained for 0.01 ~ 500nm Hydrophilic Nanofibrous in water,

Step (2)：The step of water being removed from the mixed liquor.

11. the manufacture method of lubricating grease according to claim 10, wherein, step (2) is to remove water from the mixed liquor The step of with the dispersion solvent.

12. the manufacture method of the lubricating grease according to any one of claim 9 ~ 11, wherein, the dispersion solvent be selected from More than a kind in aprotic polar solvent, alcohols and surfactant.